Cable code printer



May 23, 1933. A F, oNNERY 1,910,823

CABLE CODE PRINTER Filed Dec. 24, 1951 2 Sheets-Sheet l 'EQILEEIEIEZIECIEEEHEHE R N Q E@ zzou E H E M zmznc E N M l P u :mz: M E x 2m X E g. E omo; o E I m D E 0 Y P E L E w E m M D m Q G Q v M n mm u M l m 526e ozm :m m @Y O N205@ /uzmz @www nvmm; wnvmm. mman.: mm- 21mm. Y m 29.22528 zorzzou ALDER F. CONNERY BY 6@ ATTOR Y Filed Dec. 24,. 1931 2 Sheets-Sheet hip INVENTOR ALDER E coNNERY BY M7444@ ATTORNEY Patented May 23, 1933 UNrran sirA'rasf j Amann r. coNNERY, or BROOKLYN, NEW YORK, Assrenoa 'ro INTRNA'rIoNAL cein-n MUNoA'rroNs LABORATORIES, rnc., OF'NEWAR'K, JERSEY, A co'R-PoaArIoN or NEW YORK CABLE conn rammen VApplication'filedDeccmberifl, 193i. Serial No; 583,003..`

' asignalt for maintainin synchronism' is be'-V ing received; and simpli ed intermediate. cir` cuits usingV polarized relays. describing these features a brief' descriptionof the entirel apparatus is given, in order that the relation ofthe iniprovements to thewliole may be made clear.` The scope oftheimprovements is clearlydeinedin the claims:

@neef the objects of the invention is to provide means for makingA the printer nonresponsive to receivedsignalsWhen' no' traffic is beingfhandled and' the only signals re-4 ceive'd' are those' for maintaining. synchronism;` Intimately connectedvviththis` fea# ture is the provision forautomaticallyrestoring the printervtooperable condition when `a specialsignal is received toFindicate resump;` tion of traliic.

Another objectof the presentinvention 1s toprovide siinpliedmeans for printing fig; ures When the short figure signals of the cableV codeare received'while the printer is inthe upper case position.

A still furtherlobject is toprovide a'simple intermediate f circuit for receiving. signal im# pulses and relaying them to the otherI appa;` ratus. i

Further objects and the' means foraccomplishing them Will'be disclosed inthe specif lisation in conjunction With 'the' drawings.

In the drawings: Figure l-shovvs the cable codeand the corresponding. five-unit printer code, together With the type `bar selected by each combina# tion fof thatprinter code'; n f' Figure 2` is a schematic drawing 'ofthe c1rcuitsemployedto accomplish the various ob= jectsmentioned.

Each type bar of the five-unit `code 4printer which is to be used inconnection with this invention, is :equipped with `upper and lower case characters either of' which may be printed, depending upon the position of'i the printing plat-enf The normal 'position of the" printing platen isfthe lowercase.

A system of relays associated With the printen is arranged to` energize a magnet in the printer which Will shift therr printing platen to theupper `case position Whenever a'cable' signalcomprising uve-or more dots or dashes isreceived. When the printer is shiftedtothe' upper case, it Willremainin the'shiftedposition until the Word space7 signal is received Which Will simultaneously actuate the spacing mechanismand shift the printer into the lower ease.` In addition to this the printer is so arranged thatlit Will' unshift Whenever aspecial'unshift combina1 tion is transmitted. The" ligure` shaft ar'-l rangement disclosed herein makes it possi-`Y` ble 'to f print directly from` signals` normally adapted'to be transcribedn from la Siphon-'re-4 corderftape. Line time is saved by. the use of' short figures and iby` the automatic ligure shift and release mechanism.- Sometimes, due to transmission or line failures, impulses may drop out, causing. what' are known? as double spaces. Vhen signals are: being copied Vby: an operator from af Siphon 1recofr`d er tape, distortedsignals of this typecan be detected bythe operator, butwwh'en a print; er is usechadrop outwillicause `a Wrong: let-` ter to' be printed, `which makesailtomatic rel ception" undesirable for messages in` code; This" invention overcomes this diilicultyfby printing a special character Whenever adoul 8 ble space is received, thus indicating that-the message should be corrected.V

,Referring to Fig. l, it Willbe noted" that each letter ofthe cable code alphabet selects aw differentv combination inthe fiveprinter unit, but thereis a conflict between certain cable code letters and iigures; for example, the printer combinations for lthe letter Jandthe figurel are identical, but since the letter'J hasless than five dots'an'd dashes, the printer platen Will bein thefloWer case positionand the letter J "Willbe printed When a signal `combination is received; The combination for figure l will causetheprntf er platen to shift to theupper caser position time. VThe following abbreviations for ligures are generally used in commercial prac-v tice:

Figure 1 is set up as letter A; Figure 2 is set up as letter U;

Figure 5 is set up as letter E;

Figure 8 is set up as letter D; Figure 9 is setup as letter M; Figure 0 is set up as letter T; 2O In transmitting a group of ligures it is customary to transmit the lirst ligure of a group as a long ligure, and to abbreviate the remainder of the figures. An arrangement has been provided in the present invention so that the abbreviated ligures will be printedas ligures rather than letters, provided that the lirst ligure oli' a group is a long ligure, which will serve to shitt the printer to the upper case.l IThis is accomplished-by putting the proper figure on the same type bar with the letter corresponding to that hgure, and arranging the circuits so that when the cable code combination for any long ligure is received, the .printer will shift to the upper case printing position and remain in the shifted position until either a word space or unshift signal is received. Meanwhile it a short ligure signal is received, the printer will operate and print the corresponding ligure. Means for accomplishing this shift and the printing of a ligure when a short figure combination is received, will be described hereinafter in detail. Y

The actual operat-ion of the printing circuits will now be explained in detail, reference being made to Figure 2. It should be understood that the transmission at the distantend of the cable must be automatic so that thesignals are sent out at constant speed. The distributor at the receiving end of the cable is operated in synchronism with the received signals and operates the printing circuits.

Magnets 1-5, inclusive, represent the live selecting magnets ot a printer.v The start magnet and the ligure shift magnet are shown by 6 and 7, respectively. All the relays in this drawing are of the neutral or non-polarized type, except intermediate relays v26 and 34, which are polarized. All relays are shown in their normal positions. In tracing the circuits reference will be made to the relay tongues resting on the marking and spacing contacta It will be understood that the relay tongue moves'to its marking position 65 when the relay is operated, and that when the relay is de-energized, the tongue will move to its spacing position. Dot and dash receiving relays are shown, respectively, as 9 and 10, and it is to be understood that the dot or dash relays will be operated when the dots or dashes of the cable signal are received. The actual coupling of these dot and dash relays to the cable may be done in any suitable manner, and since it is well known in the art, and forms no part or" this invention, there is no need to described it here in detail. A developed View of the distributor is shown at 11 and the brushes 12 are assumed to be in synchronism and in suitable phase relation with the operation of the dot and dash relays 9 and 10. Methods of maintaining the distributor brushes in synchronism with the received signals are well known, and any suitable means may be employed with this invention. l Y

The segments ol' thefdistributor are arranged in groups of three,revery third segment being connected together, any suitable number of groups being arranged in the distributor face plate. The brush 12 as it rotates connects positive batteryr 40 to the segments. The segmens of the respective groups are indicated in Fig. 2 of the drawings by the letters C, B and A. rIhe arrangement is such that the brush passes over the three segments in the order C, B, A each time a dot, dash or Zero signal is received. The transit time of the brush over the segments is about one-half the duration of each impulse, and the segmented ring is so oriented in relation to the incoming signalsV that the brush passes over the C, B and A group while the central portion of each impulse is being received.

As the brush passes over each C segment, positive battery is connected through the windings of relay 33 to ground, operating the relay and opening the locking circuit from battery l5, which releases any relay in the circuit that might have been locked due to a prior selection. When the brush passes over a B segment and the impulse then being received is a dot, the signal of which it Jforms part comprising less than live dots and dashes, positive battery l0 is vconnected over the contacts of relay 21 and contacts of relays 35 and 34 to the winding of the lirst selector magnet 1 and thence to ground. In other cases the impulses of a B segment serve to control the various relays in a printer lselector system.

As the brush passes over an A segment the circuit is closed from positive battery through tongue A and contact of relay 35 to operate relay 13. It is to'be noted that relay 13 operates only on a dot or dash, while relay 14 operates when a Zero signal is received. After the operation ol' relay 15, which occurs when brush 12 Vleaves the A segment, relays 16, 17, 18, 19, and 20'operate and lock up progressively, (the number operating depending onthenumber of dots anddashesin a character), as the `brush passes over the segments indicated by the letter' Key is provided` in order to permit the de-energizationot relay.` 21 by short circuiting its locking winding-through au circuit from battery 56, tongue B ofrelay 211 andresistance 61 to` ground. When relay 21 has thusbeen cle-energized, it. will operate again only when relay 20 is operated. ince relay 2O is the last one of` the chain` of relays lll- 20, itrwillbe operated only when a signal containing more than tive dots and dashes is'received. Consequently depression of key 55 and'consequent de--energization of relay 21 `breaks the circuit -from the B segments to tongue C oi relay 35 and thus removes battery 'from thecircuits to the printer magnets` and 'to,tilling in relays` 27,28, 29 and prevents their operation while synchronizingsignals are beingrreceived, since the type oli` signal chosen to keep the distributors in synchronisin during idle periods does not have sufcient dots or dashes to step up the counting relay `bank to its limit. The

magnets are restored to operative. position when a signalcontaining more than live dots and/or dashes is received, forA the counting bank then operates to the limit and battery applied over the contacts oi'.relay 2O op-` erates relay 21 which then locks, the key having been released to break the. short circuit around the locking winding.

Assume now that the signals corresponding to the letters AN are received, and that they are in proper` phase relation with the distributor segments as shown by eurve Lllat the top of Fig. 2. Before brush 12 reaches the irst groupof segments, the dot` relay 9 will closeits contacts and acircuit will be completed from positive battery thnu the lower half` of potentiometer 58, the middle winding ofintermediate relay 26, the winding of intermediate relay 34;', tongue and marking;l contact of the 4dotrelay to negative plate of battery 4 2. AAV circuit is also set up from positive battery through the spacing Contact ofdaslr relay 10, the upper Winding otrelay 26, the lower portion of potentiometer 57 to positive battery. Also thebiasing current through the lower winding of relay 26 is maintained at all times over a ci-rcuit from the positive plate of battery l2 through resistance 59 and lower winding ot'relay 26 to the negative pole ofthe same battery.

When positive battery is flowing from the right to the left-hand terminals of `any winding of relays `26 or Bil, thetongueot that relay will tend to move to its marking contact. 1t will be seen that under the conditions just set forth, relay 26 will have its tonguellying on the marking contact whilerelay 34, due to the current 'flowing intheupper and lower windings, willalsophave its tongue-lying on the marking contact;

`Then the tongue of relay 26moves to its marking contact relay 35 will operate, and whenitongue B of relay 35 leaves its spacing contact ground will be removed from the locking circuity ot relays 13 and15 and these relays willbede-energized. As tongue A of relay 13 leavesl its contact it will cut oft locking battery :from all the relays of the counting bank 13-20, which may have beenoperated-by a previous selection, and the tongues will fall back to the spacing position. brush 12 passes over segment C relay 33 will operate, cutting oii battery 45 and unlocking all the relays the locking windings of whichare connected to its armature A. During the time that the brush is on the B segment a circuit will be completed from positive battery ll() through the tongue A ot relay 21 and co-operating contact, tongue C of relayl 35 `and its marking contact, tongue of relay 34 and its marking Contact, tongue B of relay 15 and itsspacing contact, and selector magnet 1 of the printer to ground, causing selector magnet 1 to operate.

The brush now passes over the AV segment which operates relay 13- over a circuit from positive battery l0 through brush 12, segment A, tongue B and spacing contact of relay 15, tongue A and marking Contact of relay 35, winding of relay 13, tongue B and marking contactofrelay 35 to ground. Relay 13 operates at this time, preparing a locking circuit through the winding of relay 15 which is utilized immediately afterward, when brush 12 leaves the A segment and removes the short-circuit from the winding of relay 15.

During the time the brush is travelling from the A segment to the C segnient the incoming signalfwill changeirom a dot to a dash. The currentthrough the winding ot' relays 34E, and the upper and middle windings o-relay26 will be reversed. The tongue of-relay 311 will move to its spacing contact; but dueto the effect oir its `upper winding the tongue of relay 26 will remain on the marking contact and relay V35will continue energized. The brush nent pass-es over segment C which causes battery to be supplied to the winding otrelay 33 which momentarily operates. Since none of the relays which lock up through the contacts of relay 33 hasbeen energized, the relay bank 27-29 and 31 is not effected. Next, the brush passes over a E segment. Since relay 15 is now operated a circuit willbe completed from battery 4:0, armature A and co-operatingcontact of relay 21, tongue C and marking contact of relay 21, tongue Cand marking contact of relay 35, tongue and spacing contact of relay 34, tongue C and marking contact of relay 15, tongue C and spacing Contact of relay 17, `and the right-hand `winding of relay 27fto ground. Parallelcircuits are also completed through tongue C of relay 19 to the right-hand winding of relay 28, and from the spacing contact of relay 34 directly to the right-hand Winding of relay 29. Relays 27, 28 and 29, will, therefore, lock up through their respective tongues A and co-operating contact-s to effect the filling in of certain impulses to the printer selector magnets, as Will be explained later.

The brush now passes over the A segment and relays 16 and 17 are operated and locked in the operated position. During the time the brush is passing from the A to the succeeding C segment the letter space or vZero signal Will be received, and the armatures of relays 9 and lOwill be operated to the positions shown in the drawings. Bue to this positioning of the relay tongues, the current flow through the windings of relays 26 and 34 is such that the tongues of both relays move to their spacing contacts. liVhen relay 35 is de-energized, due to the de-energization of relay 26, relays 13 and 15 Will unlock and return t-o their normal positions, and the breaking away of tongue A of relay 13 from its contact will, in turn, unlock all other relays ef the bank 16*20. When the tongue of relay 26 touches the spacing contact, a circuit is established from positive battery 46 to respective B tongues of relays 27, 28 and 29, the co-operating contacts of which are connected respectively to printer select-or magnets 3, 4 and 5. Current will, therefore, flow from battery 46 to the third, fourth and fifth printer selector magnets Which will be operated. Magnets which have now been ol erated are 1, 3, 4 and 5, which combination corresponds to the printer code combination for the letter A. It will be noted that magnet 1 rwas operated directly from the received signals, While magnets 3, 4 and 5 Were operated from relays 27, 28 and 29. A sixth pulse or printer actuating magnet has not yet been operated. lVhen the brush passes over the C segment relay 63 Will be momentarily energized and relays 27, 28 and 29 will be unlocked and restored to normal. The brush noiv passes over the'B segment and a circuit is completed from positive battery to tongue A and co-operating contact of relay 21, tongue C and spacing contact of relay 35, tongue l) and spacing contact of relay 15 to magnet 6 and ground. Magnet 6 now operates and, due to the selection set up, the letter A is printed.

.The brush 12 now passes over A segment and this will operate relays 13 and 15 of the counting bank. During the time a brush is passing over the space between the A and C segments, the dash of the letter N Will be received and dash relay 10 will operate.

When relayv lOroperates it causes current to flow through the upper and middle Windings of relay 26 in opposite directions, the current in the upper Winding being in' a direction tending to mark the relay and that in the middle Winding tending to space the relay. The effect of the current in the upper Winding aided by the current in the lower or biasing Winding causes the relay tongue to move to its marking contact. Current flow through the Winding of relay 34 is in such a direction as to cause th-e tongue of that relay to remain on its spacing contact. Operation of relay 26 will, in turn, cause relay 35 to operate and When the tongue of relay 35 leaves its spacing contact the operated relay of the pair, 13 and 14, Will be unlocked and restored to normal. When the brush passes over the C segment relay 33 Will be operated and remove the locking current from the relays associated with its contact. lVhen the brush passes over the B segment a circuit Will be completed through tongue A and corresponding contact of relay 21, tongue C and marking contact of relay 35, tongue and spacing contact of relay 34, to the operating Winding of relay 29 Which Will operate and lock in its operated position. The locking circuit for relay 29 is from battery 45 through the Winding, tongue A and corresponding contact of relay 29 to ground.

When the brush passes over the A segment counting relays 13 and 15 Will operate and lock. During the time the brush is passing 'from the A to the C segment the incoming signal Will change from a dash to a dot, and relay 9 Will operate, causing the tongue of relay 34 to move to its marking contact and maintaining the tongue of relay 26 on its marking contact. Relay 35 is, in turn, maintained operated due to the position of the tongue ofvrelay 26. Y Y

The brush Will neXt'pass over the C segment which Will momentarilyoperate relay 33 and cause relay 29 to unlock. The brush noW Apasses over the B segment and a circuit is completed from the Bl segment through the tongue A and contact of relay 21, tongue C and marking contact of relay 35, tongue and marking contact of relay 34, tongue B and marking contact of operated relay 15, tongue B and spacing contact of unoperated relay 17, to printer magnet 2 which Will now operate.

The brush 12 then passes over a segment A and relays 16 and 17 operate and lock. Duringthe time the brush is passing from the A to the C segment the incoming signal is changed to zero and'relays 9, 10, 34, 26 and 35 Will all restore to normal. When relay 35 restores, tongue B leaves its marking contact. This unlocks relays 13 and 15. Release of relay 13 in turn releases the other relays in the counting bank. The restoration to normal of relay 26 completes acircuit from battery 46 through the tongue and spacing contact of relay 26 to tongues B of relays 27, 28 and 29, but since none of these is operated this circuit is Without effect. Selector magnets 3, 4 and 5 are, therefore, Vnot ftongue C and spacing contact of relay 35,

tongue D and spacing contact of relay 15, to printer actuating magnet 6 Which initiates the ,printing ofthe letter N, the combination for Which is the second pulse alone. Cther lettercombinations canbe traced through the circuit in a similar manner.

ln addition to selecting and `printing any letter which may be desired, it is necessary that figures, punctuation marks, and special characters be received. In order to accom- -plishthis the printer is equipped with type bars having two sets of type, either of which may be used in printing depending uponthe position ofthe printing platen at the time When "the type "bar is operated. y

Having shown hov.7 letters are printed the method of actuating the apparatus to print figures Will novv be described. Assume that the figure 22 is to be received` In order to save line time the figure will be sent as a long figure 2 followed bya short figure 2. The signal for longfigure 2 is seen by reference to Fig. 1 to be dot, dot, dash, dash, dash, Zero, While that for short figure 2 is as Was explained previously the same as that for letter U which is dot, dot, dash, Zero.

The first dot received will cause operation of relays 9 and 10 and also of relays 34,l 26 and 35. When the brush 12 passes over segment C relay 33 will operate removing locking battery 45 from the locking windings 27, 28, 29, '31 and 32. The brush `next passes over the B segment completing` a circuit, previously described, to tongue C of relay 35 and thence over its marking contact, tongue and marking contact of relay 34, tongue and marking contact of relay 15, now unoperated, to printer first pulse magnet, k1, Which operates. lThe brush passes over segment A and causes relays 13 and 15 to operate in a manner `already described. y i

The second impulse, also a dot, is received `While the brush is between theA segment and the next C segment. When the brush reaches the C segment locking battery 45 is again momentarily removed from' the group of relays Without effect. VVh'en the brush passes over the B segment a circuit is `conipleted from tongue C of relay 35, throughtongue and marking contact of'relay 34 toiigue B and marking Contact of relay 15 and thence through tongue Band spacing Contact of unoperated relay 17 to printer selector magnet 2.

`and lock to battery 45.

Lgine.

The next or third impulse is a dash. This is received While the brush is between segments C and A; it causes the tongue of relay 34 to move to its spacing contact. When `the brush reaches segment `C relay 33, is Aenergized and operates to unlock certain relays, Without eect since none was operated. The brush now passes over a B segment and a circuit is completed from tongue C of relay 35 over the associated spacing contact and the tongue and spacing contact ofrelay 34 to relay 29 and also over a parallel path comprising tongue C and marking `contact of relay 15 and tongue C of unoperated Vrelay 19 to relay 27. Relays 27 and 29 operate The brush Vpasses over the A segment causing Vthe roperation of relays 18 and 19.

`While the brush is between the C andA segments the fourth pulse, also a dash, is received. Vhen the brush reaches the C segment battery is removed from the locking contacts of relays 27 and 29 Which cle-'enerlVhen the brush reaches segment B, relay 29 lis opera-.ted in exactly the same manner as on the fourth pulse but relay 27 Vis now not operated due to breaking of its circuit at contact C of relay 19 When that relay operated. The A segment is novv traversed by the brush causing relay `20 to operate.

rlhe fifth pulse, also a dash is now received. When the brush passes over segment C relay 29 is released. W'hen the B segment is traversed relay 29 is again operated and locked in exactly the same manner as on the fourth pulse. At the same time a parallel circuit is completed from tongue C ofrelay 35 through its marking contact, tongue C and marking contact of relay 20 and Winding of relay 32 to ground. Since tongue C of relay 35 is supplied at the instant, with battery from seg ment B, relay 32 operates. This relay locks to battery 45; in parallel With the locking circuit there is established a circuit from battery 45 through contact and tongue'A of relay`32 'to printer shift magnet 7. This magnet now operates shifting the printing platen to the upper case position. The brush now traverses the A segment but Without effect since all the counting relays are loperated.

The zero impulse of the signal is now re# ceived, causing the tongues lof relays 26, `34 and 35 to move to their spacing contacts. When the tongue of relay 26 reaches its space ing Contact a circuit is completed from -battery 46 over tongue B and associated contact of relay 29 to printer fifth pulse magnet 5. When relay 35 de-en'ergizes and tongue B leaves its marking contacts, relay 13 is deenergized and thereupon all relays of the counting `group have locking battery cut ofi' and restore to normal. VV'hen the brush reaches the C segment, relays 29 and 32 restore to normal and lprinter shift magnet7 de-energizes Since, however, the printer platen is arranged to mechanically lock in upper case position, this is without effect. When the brush reaches the B segment a ycircuit is completed from tongue C of relay 35 through the associated Contact and tongue C and marking contact of now normal relay l5 to printer actuating vmagnet 6 initiating operation of the printer. Since the combination selected in the printer was 1, 2, and 5, and since the printing platen is in upper case position, the charac-ter printed will be figure 2. Itis to be noted in connection with this that although the cable signal was dot, dot, dash, dash, dash, the circuits are so arranged that the fth impulse sent to the printerisreversed from that of the cable code. In general the printer is so arranged that when a signal comprising five or more dots and/ or dashes is received over the cable, the fifth pulse is reversed, thus forming a different printer combination for the printer when a signal is received over the cable; which 'without the turnover mentioned would be the same as a signal formed by filling in pulses in the manner described for letters A and N.

The brush 12 now passes over an A segment which causes relays 14 and l5 to operate since at this time the Zero signal is still being received. This explains why relays 13 and 14 are provided to operate in parallel, namely, so that whether a signal received when all counting relays are unoperat-ed is dot, dash or Zero, the counting will be initiated.

During the time that the brush is passing from the A to the succeeding C segment the signal changes from Zero to dot. The Vdot signal is the first signal of the combination for U which is the abbreviation for ligure 2, or short figure 2. Relays 34, 2G and 35 now mark. hen the B segment is reached by the brush printer magnet 1 operates. Then as the brush passes over the A segment, relays lG and 17 operate.

Now the second impulse, a dot, is received and relays 34, 26 and 35 remain in the marking position. .The brush reaches the C segment and unlocks relays 271-31. Vhen the brush passes over the B segment, printer second pulse magnet 2 is operated. The brush then passes over the A segment causing relays 18 and 19 to operate.

'While the brush is passing from C segment to A segment the received signal changes to a dash, the third impulse for letter U in the cable code being a dash. Relay 26 now spaces. .`When brush 12 reaches the C segment relays 27-31 are again unlocked, in'- efl'ectively since they have not been operated. When the brush reaches the B segment relays 28 and 29 are operated. When'tlie A segment is reached relay 20 operates.

During the time the brush traverses the distance from A segment to C segment, the zero pulse of the U signal is received. The tongues of relays 26, 34 and 35 return to their spacing contacts. A circuit is completed from battery over tongue and spacing contact contact and de-energizes the locking winding of relay 14 which restores to normal and deenergizes all other counting relays.

Brush 12 now reaches the C segment de-en ergiZing relays 28 and 29 due to removal of locking battery from their windings at the contact of relay 33. The B segment is now reached by the brush and a circuit completed to operate the printer lactuating magnet 6. Operation of the printer is now initiated, the combination for the letter U haring been selected. Since, however, the printing platen is now in upper case position, operation of the U-2 type bar causes printing of the figure 2. Y

F rom the foregoing description of the printing of numeral 2L, it is seen that the 1U-2 type bar is actuated upon reception by the printer of either of two signals, namely, one comprising pulses 1, 2 and 5 and one comprising pulses 1, 2, 4 and 5. rThis is made possible by a mechanical arrangemet of the printer code bars one of them having two notches rather than the single one ordinarily used in standard printers. This feature is well understood and will not be explained in detail. It permits of the selection of the same type bar by two signals differing only in the character of one impulse and permits using a smaller number of type bars. Some other type bars are similarly arranged as will appear hereinafter.

The printer platen will remain in the upper case after being shifted thereto until either of two signals, namely, the word space signal or the unshift signal, is received. This permits the abbreviations for figures, or short figures, as they are commonly called,A to be transmitted and the associated figures printed directly as described.

A word space signal consists of three spacing or Zero units in the cable code. One of these Zero units properly belongs to the last letter received and two additional Zero units are sent when a word space is desired. the three zero units are received it is necessary that the printer space without printing. In order to show how the printed platen is resorted to its normal position and at the same time describe the word space operation, we will consider the condition of the printer after the platen has been shifted to the upper case position and a portion of the combination for the letter A which in this upper case position would cause the. figure 1 to be print* ed, received.

ssuming now that the combination for the letter A as shown in Fig. 2 and as de* scribed previously, has been partially received, and that the dash of that combination has ust been completed and the dot and dash relays 9 and 10 restored to normal, We find that, next, the brush Will pass from the C segment to the A segment. All the relays of the counting bank will be in their unoperated positions. When the brush passes over the C segment, relay 33 will be momentarily op erated and Will unlock relay 32, thus deenergizing shift magnet 7. (lt is to be understood that the de-energization of shift magnet 'Z does not cause the printer platen to return to its lower case position, since the ,arrangement to return the platen is a well known mechanical one operative when the Word space type bar has been actuated.) Now, when the brush passes over the Bl segment, a circuit Will be completed through tongue A and contact of relay 21, tongue C and 'spacing contact of relay 35, tongue D and spacing contact of relay 15, to operate the start magnet 6 which Will initiate the printing of the ligure 1, previously selected. Brush 12 new passes over the A segment and causes energiZ-ation of relays 13 and 15, which lock in their operated positions. When the brush passes over Vthe nent C segment relay 33 is again momentarily energized, but Without effect. l/Vhen the brush passes over the B segment a circuit is completed from battery to tongue A of relay 21 and co-operating contact, tongue C and spacing Contact of relay 35, tongue D and marking cont-act of relay `15, and the right-hand Winding of relay 3l.

Relay 31 now operates and locks through its tongue A and co-operating contact. The operation of relay 31 causes a completion of circuit-s from battery over tongues D, E and F to magnets 1, 3 and 5`of the printer, which are energized, tripping the printer code bars in a Well known manner.

The brush noW passes vover segment A, causing counting relays 16 and 17 to be energized. Then the brushr passes over the B segment, completing a circuit from the B segment through tongue A and contact of relay 21, tongue C and spacing contact of relay 35, tongue D and marking contact of relay 15, tongue D and marking` Contact of relay 17, tongue D and spacing contact of relay 19, to operate the actuating magnet 6 Which Will initiate the operation of the printer. Since selecting magnets 1', 3 and 5 have been operated, the type bar corresponding to the Word space will be operated. Since this type bar is not provided with type, no character Will be printed but the platen will be spaced in a manner common in the printer art. Since the Word space type bar is arranged to operatethe unshift mechanism of the printer, the platen isinoW returned to the lower case position. Should it be desired to unshift Without spacing, this may be accomplished by sending the unshift siffnal shown on Fig. 1, which operates the unshift mechanism directly Without affecting the printer spacing mechanism.` Y

lt Will be observed that during` the opera tion of the `circuits upon reception of the Word space signalrelay 31 was operated and locked. during a portion of the time. This operation was effective to operate printer selector magnets 1, 3 and 5 for operating the ,tongues B and C of relay 31 and respective contacts, printer selector magnets 2 and l to ground. Since magnets 1, 3 and 5 had already been operated, the character selected would then be that the combination for which is all live impulses, Which is seen by reference to Figurel to be the asterisk. The asterisk is used as an indication of incoming signal failure. u

The printer combination for the letter T, as shown in Figrl requires that only the fifth selector magnet be operated. Referring now to 2, it Will be noticed. that when relay 15 is unoperated, 'the operating circuits of relays 27 and 9.3 are open at tongue C of relay 15 and therefore a single unit dash cable signal will have only the Vfifth impulse lled in instead of filling in impulses 2, 3 and 4 in addition. The letter T is the only one in Which an impulse is filled in in this manner. After the fifth selector magnet has operated, the sixth pulse magnet is operated, in the same manner as for the other selection, and the letter T printed.

ln order to reduce the number of type bars in the printer it is possible to have some type bars operated on two different combinations, vvlien those combinations dier only by the character of one impulse. For example, the selecting combination in the printer code for the letter U operates the first, second, fourth and fifth printer selector maenets, While the printer combination for the figure 2 operates the iii-st, secoinl and fifth printer selector magnets, thus differing only by the character of the fourth impulse of 'the combination. By suitably arranging the notches on the printer code bars, it is possible to have the saine type bar operated when either of tivo combinations is received on the printer magnets. The letter U having less than five dots or dashes in its cable combination will print in the lovver case. Therefore, the letter U will actually be printed; while if the cable signal for the ligure 2 is received, the printer platen Will be shifted into the upper case, and, therefore, a ligure 2 Will bc'printed. The letter N and figure 2 also diller by only Vone impulse in their printer combinations, and have been arranged in the'same manner, as have been the hyphen and the letter X.

The foregoing material is given by Way et description only, and is in no Way to limit the scope ot the appended claims.

What is claimed is:

l. ln a telegraph system, the combination of' means for receiving cable code signals, means for automatically printing characters corresponding to said signals, means for rendering said printing means inoperative, and means oerative on receipt of signals having a predetermined characteristic to restore said printing means to operative condition.

2. ln a telegraph. system, the combination of means for receivingsignals 4ot unequal leng' normally operative means for printing characters corresponding to said signals, means for rendering said printing means inoperative, and means for restoring said printing means 'cooperative condition upon receipt of a signal exceeding a predetermined length.

3. ln a telegraph system for receiving signal combinations of unequal length, a printer operable only by signal combinations of equal length, relay means responsive to said received sie un combinations 'for converting them to signal combinations of equal length, normally operative means to eiiect operation of said printer in accordance with said converted signal combinations and means to render said last mentioned means inoperative.

4l. In a. telegraph system for receiving signal combinations of unequal length, a printer operable only by signal combinations of equal length, relay means responsive to said received signal combinations for converting them to signal combinations of equal length, means normally operative to effect operation of said printer in accordance With said converted signal combinations, means to render said last mentioned means inoperative, and means to restore said last mentioned means to operative condition when said received signal combinations exceed a certain length.

5. In a telegraph system, the combination means for receiving signal combinations comprised of unequal numbers oi different polarity impulses, counting means progressively operative in accordance with the number of impulses in each received signal combination, means for printing characters in accordance With the received signal combination, means for rendering said printing means inoperative, and means for restoring said printing means to operable condition when all said counting means are operated.

6. In a telegraph system, the combination of means for receiving signal combinations comprised of different'numbers of impulses,

Y have been operated to restore said printing means to operative condition.

7. ln a telegraph system, in combination, means tor receiving signal combinations of unequal length, means progressively operable in accordance with the length of said signal combinations, a relay operable by said last mentioned means, printing means normally operable in accordance with said signal combinations and under control of said relay, a key tor Cle-energizing said relay to render said printing means inoperative, said relay being re-energized When a signal combination exceeding a certain length is received.

8. In a telegraph system, the combination of means for receiving signal combinations comprising unequal numbers oi impulses of different polarity, and means for reversing the polarity of the last polar impulse of a signal combination When the impulses therein exceed a predetermined number.

9. In a telegraph system, the combination of means for receiving signal combinations comprising unequal numbers of impulses of different polarity, means for reversing the polarity of the last polar impulse of a signal combination When the impulses therein eX- ceed a predetermined number, and means operable in accordance With the converted signal combination to print the character corresponding to the received signal combination.

l0. ln a telegraph system, the combination of means for receiving signal combinations comprising unequal numbers of impulses of different polarity, means for altering the polarity of the last polar impulse of a signal when the impulses therein exceed a predetermined number, printing means operable in accordance with said converted signal combinations and shiftable to upper and lower case positions, and means to shift said printing means to the upper case position on receipt of a signal combination of impulses exceeding the predetermined number.

1l. In a telegraph system, the combination with means for receiving signal combinations comprising unequal numbers of impulses of different polarity, of printing means comprising type bars having upper and lower case characters, means for reversing the polarity ol' the last polar impulse of a signal. when the impulses thcreinexceed a predetermined total, and means for selecting a type bar and character thereon in accordance with the converted signal combination.

12. In a telegraph system utilizing a coole combination representing a character and an abbreviation therefor, a printing device having a type bar carrying both the character and the abbreviation, means for selecting said type bar in accordance With said code, and means to determine Whether said character orsaid abbreviation shall be printed.

13. In a telegraph system, means for receiving cable code signal combinations of dierent numbers of impulses, polar relays controlled by said receiving means, a olistributor co-operating with said polar relays to control recording means comprising a telegraph printer having a selecting mechanism operable by signal combinations of equal numbers of impulses.

14:. In a telegraph system wherein cable code signals composed of dot, dash and zero elements are received, intermediate polarized means for relaying said elements, a distributor and relay means co-operating With said polarized means, said distributor and relay means being arranged to control a telegraph printer having a selecting mechanism adapted to be controlled by uniform length signals formed of marking and spacing impulses. y

In Witness whereof, I hereunto subscribe my name this 23rd day of December, 1931.

ALDER F. CONNERY 

